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Physical & Chemical properties

Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12 Oct - 19 Dec 2009
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP - Guideline study
according to guideline
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Melting / freezing pt.:
> 450 °C

Please see Attachment 1 for Thermogram data.
The test material was determined to have a melting temperature greater than 723 K (450 °C).
Executive summary:


The melting/freezing temperature of the test material has been determined.

Methods employed complied with those specified in Commission Regulation (EC) No 440/2008 of 30 May 2008, Part A: Methods for the determination of physico-chemical properties.


The determination was carried out by differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86, Method A1 Melting/Freezing Temperature ofCommissionRegulation (EC) No 440/2008 of 30 May 2008. 


The test material was determined to have a melting temperature greater than 723 K (450 °C).

Description of key information

Melting point: > 450 °C (EU Method A.1, GLP)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
450 °C

Additional information

The melting/freezing temperature of dicalcium pyrophosphate was determined by differential scanning calorimetry (DSC) in a study conducted according to EU Method A.1 and GLP (Walker and O'Connor, 2010). The melting point of the test material was determined to be greater than 450 °C (723 K).